HCLTech - Australia and New Zealand Interview Questions
The questions to prepare for HCLTech - Australia and New Zealand interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Optimize a slow PostgreSQL query that aggregates completed transactions while preserving customers with no matching activity.
Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.
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Inc.
Benjamin MooreFind customers with multiple valid orders while safely handling NULL customer names, customer IDs, and order amounts.
NeenOpalCompute cosine similarity for equal-length high-dimensional vectors using dot products and Euclidean norms.
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Explain how you would manage scope creep without damaging stakeholder trust or putting delivery at risk.
Approach for handling missing, inconsistent, and duplicate data in a pipeline without breaking downstream analytics.
Design a low-latency, cost-aware serving platform for multiple fine-tuned LLMs under variable traffic.
Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.
Explain why correlated customer behaviors do not by themselves prove a causal effect, and how you would tell the difference.
Design a feature experiment with clear hypotheses, metrics, power, randomization, analysis rules, and safeguards against common pitfalls.